Async hbase 'non-blocking' calls lock thread for ~70ms, why?

Asked Nov 10 '15 at 13:51

Active Nov 10 '15 at 13:51

Viewed 163 times

I'm using this tool for talking to hbase:

org.hbase:asynchbase:1.7.0

Why does the following code take ~70 ms?

long start = System.currentTimeMillis();
Deferred<ArrayList<KeyValue>> meta = hbaseClient.get(new GetRequest(propsCtx.hbaseTable, rowIdMeta(tsnfdr.id)));
long end = System.currentTimeMillis();
log.info("supposed 'non-blocking' async hbase call took {} millis", end - start);

(The call to 'propsCtx.hbaseTable' and 'rowIdMeta(tsnfdr.id)' is not the problem).

The docs are very limited, but from the signature of the method, observations in visualvm on usage of netty threads under the hood, and a quick look at the source code tells me that I'm supposed to be using an async api.

asked Nov 10 '15 at 13:51

eirirlar

Try made this call in the loop, possible it hides some initial initialization. – Alexander Kuznetsov Nov 10 '15 at 15:39
@AlexanderKuznetsov: Thanks for the hint, I'll do more sampling, perhaps the time will go down. – eirirlar Nov 10 '15 at 20:09

Async hbase 'non-blocking' calls lock thread for ~70ms, why?

0 Answers0